<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>行高测试</title>
		<style>
			div {
				background-color: #0f0;
				/* width: 1000px; */
				
				margin: 12px auto 0px;
				border: 2px solid #f00;
				padding: 0px;
				text-align: center;
				/* font-size: 300px; */
				/* line-height: 200px; */
				/* box-sizing: border-box; */
				/* line-height: 200px; */
				height: 500px;
			}
			
			p {
				background-color: #00f;
				color: white;
				width: 1000px;
				margin: auto;
				
				height: 100px;
				line-height: 50px;
				font-size: 40px;
			}
		</style>
	</head>
	<body>
		<div>
			<p>
				第一行<br />
				第二行
			</p>
		</div>
	</body>
</html>
